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Finding the Fourth Proportional to 568.10, 851.34 and 423.65

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Solution

The fourth proportional to 568.10, 851.34 and 423.65 is: 634.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.10 : 851.34 = 423.65 : x
  2. Step 2: Convert to fraction form
    568.10/851.34 = 423.65/x
  3. Step 3: Cross multiply
    568.10x = 851.34 × 423.65
  4. Step 4: Simplify right side
    568.10x = 360,670.19
  5. Step 5: Solve for x
    x = 360,670.19/568.10
  6. Step 6: Final answer
    x = 634.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.